Just thought I'd share.
I enjoy fishing with full cork handles and after years of use they developed small cracks and gouges and what not. They make stuff called Pit paste. One i used was made by roddancer i think. Basically like wood putty.
I coated the entire handle with it. Waited about 30 minutes for it to dry. Then used 220 grit sandpaper to get the majority sanded off then finished with 400 grit. It makes the handle like brand new again.
Before i started i used magic eraser sponge thingy to clean them. It really cleans them well.
I then sealed the handles with a cork sealer u-40 cork seal.